Which toy is not patented?

According to the local financial network, as of May 6, 2023, no one applied for the patent of fingertip gyro. 1997, He Tingjie obtained the related design patent of fingertip gyro. Compared with the business operation that can make a profit of one million, she chose the way of "one book makes more profits". Without the support of venture capital, after holding the fingertip gyro patent for 8 years, she finally gave up the patent in 2005 because she could not afford the patent renewal fee of 400 dollars.